For Mattax

Thanks. been working on stuff but will get back to this more at some point.

For those wondering, I asked Geoff about the Pontiac shop manual specs, although I can get them from the library.
So looking at the Chiltons, it shows the timing at idle should be 6* BTDC, and looking at the screen shots from the '65 Pontiac FSM, the vacuum advance can add 20* degrees with roughly 15 to 16 "Hg. While it adds nothing under 8-10"Hg. With a factory cam, 15"hg at idle is not unreasonable, and certainly even a hot factory cam should be making 12-14 in Hg.

I would have thought the idle burns were quicker than that, but thats the differences in design. Real interesting solution to emissions, but also really surprising to see that sort of external device in '65. Chrysler did the same type of thing but built it into the mechanical advance of vehicles that needed CAP.